Disco 2 Td5 devoleped another eletronic fault

lost my interior lights about 3 weeks ago ?
now my air con system needs to be retuned after every engine start ....this is annoying specially when doing stop starts
air con /climate control works good just annoying having to press the power button an set my temps every time I start the engine
seems like there is some sort of memory loss

all good
found F20 fuse blown
this works interior lights and memory for the climate control